It's awesome looking, and PVD services are offered by MANY 3rd parties. However, realize it voids your warranty, and kills resale value.
Not a deal breaker for a lot of people, but useful info for sure.
I like the look, but would rather get a PVD watch that was factory done. There are enough companies offering PVD watches these days, not to have to take a Rolex and "paint" it. JMHO.
Also remember, if you like the look and already OWN a watch you love, be it Rolex or otherwise, you can have this treatment done for a few hundred dollars.
=)